Valve-testing device



E. COLEMAN.

VALVE TESTING DEVICE. APPLICATION man 050.30. 1918.

Patented Apr. 20, 1920.

. fi'z ene 65km EUGENE COLEMAN, 0F OAKLAND, CALIFORNIA.

VALVE-TESTING DEVICE.

Application filed. December 30, 1918.

To all whom it may concern:

Be it known that I, EUGENE COLEMAN, citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful improvements in Valve-Testing Devices, of which the following is a specification.

This invention is a valve testing device, particularly for testing gas engine valves.

T he invention is illustrated in the accompanying drawing which forms a part of this specification and the appended claims.

Referring to the drawing.

Figure l is an elevation of the device.

Fig. 2 is a vertical section of the device and a valve on which the device is placed for testing.

Fig. 3 is a view similar to Fig. 2 with the bulb compressed.

The device includes a glass chamber 1 and a rubber bulb 2 fitted on the top of a neck 3 extending upwardly from said chamber. A tube i extends downwardly within said bulb from the upper wall thereoi into the neck 3 below the lower edge of the bulb and has an opening 5 in its upper part leading into the bulb. E1 rubber gasket 6 is fitted on the lower edge of the chamber 1 which is adapted to rest upon the upper surface of a valve 7, when the device is placed over the valve to test it. Graduations marked 1, 2 and 8 are provided on the neck 3 with which the lower end of the tube l is adapted to register upon predetermined degrees of compression of the bulb to indicate the degree of vacuum produced in the chamber 1 when the device is placed over the valve to test it.

In testing the valve soap suds are first placed around the upper edge of the valve port. The device is placed on top of the Specification of Letters Patent.

Patented Apr. 20, 1920.

Serial no. 268,347.

valve. The bulb 2 is pressed downwardly until the lower end of the tube d registers with graduation 1 whereby air is forced out around'the edge of the gasket 6 and a slight vacuum established in the chamber 1. It air bubbles are formed in the suds around the upper edge of the valve, the valve is pitted considerably and needs considerable grinding. it no bubbles are formed the bulb is pressed downwardly until the lower end of the valve registers with graduation 2 forcing more air out and creating a greater vacuum in the chamber 1. If bubbles are then formed in the suds it indicates less pitting of the valve and the need ofless grinding thereof. If no bubbles are formed, the bulb is pressed down until the lower nd of tube l regis;ers with graduation 3, forcing all the air out of the device and creating a complete vacuum therein. If bubbles are formed in the suds it indicates still less and only slight pitting of the valve and the need of only slight grinding of the valve. If no bubbles are formed there is no pitting and no grinding of the valve is necessary.

Having described my invention, I claim:

1. A valve testing device including a chamber applicable to a valve, means for exhausting the air from said chamber, and means for determining the degree of vacuum produced in said chamber.

2. A valve testing device including a chamber formed with a neck, a bulb fitting on the top of said neck, a tube extending from the upper wall of said bulb into said neck, said neck having graouations to be read with the lower end of said tube for determining the degree of vacuum in said chamber.

In testimony whereof I afix my signature.

EUGENE C LEMAN. 

